GMC

GMC troubleshooting questions? Ask a mechanic for answers

Connect one-on-one with {0} who will answer your question

Related GMC Questions
Change out the Bank2 O2 sensor. On and off cycling of engine
Change out the Bank2 O2 sensor. On and off cycling of engine warning light. Same code reappears on scan tool … read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
33,949 satisfied customers
P175 and 172 guzzling gas and performance issues. Air filter
Air filter replaced 2 months ago haven't checked the o2 sensors yet … read more
Amedee
Amedee
Automotive Consultant
Vocational, Technical or Trade Scho
21,239 satisfied customers
I have a p0171 code popping up on my truck. Check engine
I have a p0171 code popping up on my truck. Check engine light came on for that code so I put fuel injectors cleaned in side gas than u plunged battery to turn off code than later check engine light c… read more
online007
online007
Vocational, Technical or Trade Scho
1,817 satisfied customers
My 02 heater and EVAP monitors will not run complete for
My 02 heater and EVAP monitors will not run complete for inspection would a air bag light on the dash stop this from completing? … read more
Eric
Eric
Retired
N/A
38,386 satisfied customers
Again with my 2004 GMC Yukon Denali--I think I may have
Again with my 2004 GMC Yukon Denali--I think I may have 'ingested' a vacuum line cap through the opening where my coolant temperature sensor plugs into the engine (right behind the positive jump termi… read more
Eric
Eric
Retired
N/A
38,386 satisfied customers
P0877 P0872 P0842, 2008 GMC Yukon Denali, troubleshooting
Had O2 sensor issue and replaced CAT system with all four O2 sensors had multiple O2 changes after initial replacement, then new transmission pressure sensor issues immediately thereafter … read more
GM Bob
GM Bob
Automobile Technician
High School or GED
1,117 satisfied customers
I have a 2008 GMC Yukon Denali and spilled my water bottle
I have a 2008 GMC Yukon Denali and spilled my water bottle on the front leather seat. The next day the "service air bag system" light went on only when I sat down in the driver seat. Is there a sensor… read more
Tim Mohr
Tim Mohr
SHOP OWNER
Master's Degree
17,635 satisfied customers
2007 GMC Yukon XL Denali. Code P0430. Likely the bank 2 Cat
2007 GMC Yukon XL Denali. Code P0430. Likely the bank 2 Cat but maybe the sensor? … read more
Juan Crespo
Juan Crespo
Sr. Technician
Bachelor's Degree
1,262 satisfied customers
GMC Sierra 1500 Classic SLT: I have a 2001 gmc sierra 1500
I have a 2001 gmc sierra 1500 with a 5.3 2wd. Code po420 came on today. Bank 1. I have 338k on the truck. A live scan showed readings are close on the o2 sensors before and after bank 1 cat.Truck runs… read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
GMC Yukon XL 1500: 2002 gmc Yukon Xl 4x4 getting 9 miles per
2002 gmc Yukon Xl 4x4 getting 9 miles per gallon new fuel pump pressure regulator plugs and filters new cat converters runs great no codes help please… read more
FIX  IT MAN
FIX IT MAN
Automotive Repair/Damage Investigator
Associate Degree
14,692 satisfied customers
GM 2005 Denali XL: We have a Yukon Denali XL that we purchased
We have a Yukon Denali XL that we purchased new in 2005. It has 65,000 miles and has been a great vehicle for us. In the past six months, however, it has started to hesitate. When we are accelerating … read more
Pete
Pete
Automotive Diagnostic Specialist
General auto certifications
33,949 satisfied customers
GMC YUKON: I have a 99 GMC Yukon with a 5.7 vortec engine.
I have a 99 GMC Yukon with a 5.7 vortec engine. Put in New fuel pump (which required new wiring of female end from truck to pump) and a k&n air filter and know po175 code and check engine light comes … read more
Gary
Gary
ASE Certified Technician
Vocational, Technical or Trade Scho
1,589 satisfied customers
GMC youkon denali: My mom has a 2007 gmc yukon denali that
My mom has a 2007 gmc yukon denali that she has never had any problem with until sat. it died and had to crank for a while before starting then drove 120 miles home then the engine light came on after… read more
Eric
Eric
Retired
N/A
38,386 satisfied customers
GMC Yukon: i have a 1998 Yukon 5.7 code R. Magnaflow high
i have a 1998 Yukon 5.7 code R. Magnaflow high flow cats, 4 new 02 sensors 6 weeks ago, Code P0402 is coming up with the engine light on. researching codes and their sub catagories is somewhat confusi… read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
929 satisfied customers
GMC Yukon Denali 2005: My 2005 Yukon Denali had an intermittent
My 2005 Yukon Denali had an intermittent issue with the Check Airbag light. Now it appears to be on all the time. Is there a common problem with these that I could check instead of paying the dealer? … read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,912 satisfied customers
GM yukon: 2008 yukon denali. service engine soon light came
2008 yukon denali. service engine soon light came on today. Idol is erratic and accelerator hesitates a 1/2-full second before engaging. had codes checked at autozone it said bank 1 and bank 2 oxygen … read more
Mike Kelly
Mike Kelly
Auto Mechanic
Vocational, Technical or Trade Scho
2,509 satisfied customers
GMC Yukon Denali: On a 2008 GMC Yukon Denali w/6.2L - we have
On a 2008 GMC Yukon Denali w/6.2L - we have OBDII code P1174 - Fuel Trim Adaptation inactive Bank1 malfunction - (2 codes) - Any fix?… read more
Dave Nova
Dave Nova
GMC Technician
Associate Degree
929 satisfied customers
GMC Serria: 1998 GMC Serria 1500, 5.0 V8 stumbles and backfires.
1998 GMC Serria 1500, 5.0' V8 stumbles and backfires. This condition just started on start-up two weks ago (never drove it). I've checked the EGR, Fuel pressure, cat conv, cap & rotor and replaced plu… read more
Gm Tech (Cam)
Gm Tech (Cam)
GMC Mechanic
Vocational, Technical or Trade Scho
1,912 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

Mary C.Freshfield, Liverpool, UK

This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!!

AlexLos Angeles, CA

Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, NC

Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around.

EstherWoodstock, NY

Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know.

RobinElkton, Maryland

He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Gm Tech (Cam)

Gm Tech (Cam)

GMC Mechanic

1,912 satisfied customers

GM Grand Master Technician 2007. 14 year experience.

Gary

Gary

ASE Certified Technician

1,589 satisfied customers

GCM master tech over 25 years

Dave Nova

Dave Nova

GMC Technician

929 satisfied customers

ASE Master Certification. GM World Class Certification

Chris (aka-Moose)

Chris (aka-Moose)

GMC Technician

766 satisfied customers

16 years of experience

JFN1

JFN1

ASE Certified Technician

272 satisfied customers

GM Master Technician

Don - Mo Lurch

Don - Mo Lurch

ASE Certified Technician

248 satisfied customers

GM, GMC, Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics

Mike S.

Mike S.

ASE Certified Technician

241 satisfied customers

GMC N.A.I.S.E. Certified Auto-Mechanic

< Previous | Next >

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x